| 1 |
<?php |
| 2 |
/** |
| 3 |
* Firewall Class |
| 4 |
* |
| 5 |
* WordPress-optimized firewall protection |
| 6 |
* |
| 7 |
* @package Vigilante |
| 8 |
*/ |
| 9 |
|
| 10 |
// Prevent direct access |
| 11 |
if ( ! defined( 'ABSPATH' ) ) { |
| 12 |
exit; |
| 13 |
} |
| 14 |
|
| 15 |
/** |
| 16 |
* Class Vigilante_Firewall |
| 17 |
* |
| 18 |
* Provides firewall protection against common attacks |
| 19 |
*/ |
| 20 |
class Vigilante_Firewall { |
| 21 |
|
| 22 |
/** |
| 23 |
* Rate limiting window, in seconds. |
| 24 |
* |
| 25 |
* The "Requests per Minute" setting is measured over this window. |
| 26 |
* |
| 27 |
* @var int |
| 28 |
*/ |
| 29 |
const RATE_LIMIT_WINDOW = 60; |
| 30 |
|
| 31 |
/** |
| 32 |
* Settings instance |
| 33 |
* |
| 34 |
* @var Vigilante_Settings |
| 35 |
*/ |
| 36 |
private $settings; |
| 37 |
|
| 38 |
/** |
| 39 |
* Activity log instance |
| 40 |
* |
| 41 |
* @var Vigilante_Activity_Log |
| 42 |
*/ |
| 43 |
private $activity_log; |
| 44 |
|
| 45 |
/** |
| 46 |
* Firewall options |
| 47 |
* |
| 48 |
* @var array |
| 49 |
*/ |
| 50 |
private $options; |
| 51 |
|
| 52 |
/** |
| 53 |
* Current request data |
| 54 |
* |
| 55 |
* @var array |
| 56 |
*/ |
| 57 |
private $request_data = array(); |
| 58 |
|
| 59 |
/** |
| 60 |
* Constructor |
| 61 |
* |
| 62 |
* @param Vigilante_Settings $settings Settings instance. |
| 63 |
* @param Vigilante_Activity_Log $activity_log Activity log instance. |
| 64 |
*/ |
| 65 |
public function __construct( $settings, $activity_log ) { |
| 66 |
$this->settings = $settings; |
| 67 |
$this->activity_log = $activity_log; |
| 68 |
$this->options = $settings->get_section( 'firewall' ); |
| 69 |
|
| 70 |
// Run firewall checks - must be after plugin init (priority 1) |
| 71 |
add_action( 'init', array( $this, 'run_firewall' ), 2 ); |
| 72 |
|
| 73 |
// Rate limiting |
| 74 |
if ( ! empty( $this->options['rate_limiting']['enabled'] ) ) { |
| 75 |
add_action( 'init', array( $this, 'check_rate_limit' ), 2 ); |
| 76 |
} |
| 77 |
} |
| 78 |
|
| 79 |
/** |
| 80 |
* Run all firewall checks |
| 81 |
*/ |
| 82 |
public function run_firewall() { |
| 83 |
// Skip for whitelisted IPs |
| 84 |
if ( $this->is_ip_whitelisted() ) { |
| 85 |
return; |
| 86 |
} |
| 87 |
|
| 88 |
// Skip for whitelisted User-Agents (ManageWP, MainWP, etc.) |
| 89 |
if ( $this->is_ua_whitelisted() ) { |
| 90 |
return; |
| 91 |
} |
| 92 |
|
| 93 |
// Check if IP is blacklisted |
| 94 |
if ( $this->is_ip_blacklisted() ) { |
| 95 |
$this->block_request( 'ip_blacklisted', __( 'IP address is blacklisted', 'vigilante' ) ); |
| 96 |
} |
| 97 |
|
| 98 |
// Gather request data |
| 99 |
$this->gather_request_data(); |
| 100 |
|
| 101 |
// Check if User-Agent is blacklisted (after gathering request data) |
| 102 |
if ( $this->is_ua_blacklisted() ) { |
| 103 |
$this->block_request( 'ua_blacklisted', __( 'User-Agent is blacklisted', 'vigilante' ) ); |
| 104 |
} |
| 105 |
|
| 106 |
// Run security checks |
| 107 |
// NOTE: These are PHP-based checks that complement htaccess rules |
| 108 |
// Some protections exist in both layers for defense in depth |
| 109 |
$checks = array( |
| 110 |
// PHP request filtering (complements htaccess block_bad_query_strings) |
| 111 |
'block_bad_query_strings' => 'check_query_strings', |
| 112 |
'block_sql_injection' => 'check_sql_injection', |
| 113 |
'block_xss_attacks' => 'check_xss_attacks', |
| 114 |
'block_file_inclusion' => 'check_file_inclusion', |
| 115 |
'block_directory_traversal' => 'check_directory_traversal', |
| 116 |
// Bot protection (complements htaccess block_bad_bots) |
| 117 |
'block_bad_bots' => 'check_bad_bots', |
| 118 |
'block_empty_user_agent' => 'check_empty_user_agent', |
| 119 |
); |
| 120 |
|
| 121 |
foreach ( $checks as $option => $method ) { |
| 122 |
if ( ! empty( $this->options[ $option ] ) && method_exists( $this, $method ) ) { |
| 123 |
$result = $this->$method(); |
| 124 |
if ( is_string( $result ) ) { |
| 125 |
$this->block_request( $option, $result ); |
| 126 |
} |
| 127 |
} |
| 128 |
} |
| 129 |
|
| 130 |
// Check HTTP method if limit_http_methods is enabled |
| 131 |
if ( ! empty( $this->options['limit_http_methods'] ) ) { |
| 132 |
$this->check_http_method(); |
| 133 |
} |
| 134 |
} |
| 135 |
|
| 136 |
/** |
| 137 |
* Gather current request data |
| 138 |
*/ |
| 139 |
private function gather_request_data() { |
| 140 |
$this->request_data = array( |
| 141 |
'uri' => isset( $_SERVER['REQUEST_URI'] ) ? sanitize_text_field( wp_unslash( $_SERVER['REQUEST_URI'] ) ) : '', |
| 142 |
'query_string'=> isset( $_SERVER['QUERY_STRING'] ) ? sanitize_text_field( wp_unslash( $_SERVER['QUERY_STRING'] ) ) : '', |
| 143 |
'user_agent' => isset( $_SERVER['HTTP_USER_AGENT'] ) ? sanitize_text_field( wp_unslash( $_SERVER['HTTP_USER_AGENT'] ) ) : '', |
| 144 |
'referer' => isset( $_SERVER['HTTP_REFERER'] ) ? esc_url_raw( wp_unslash( $_SERVER['HTTP_REFERER'] ) ) : '', |
| 145 |
'method' => isset( $_SERVER['REQUEST_METHOD'] ) ? sanitize_text_field( wp_unslash( $_SERVER['REQUEST_METHOD'] ) ) : 'GET', |
| 146 |
'ip' => $this->get_client_ip(), |
| 147 |
); |
| 148 |
} |
| 149 |
|
| 150 |
/** |
| 151 |
* Check for malicious query strings |
| 152 |
* |
| 153 |
* @return string|false Error message or false if safe. |
| 154 |
*/ |
| 155 |
private function check_query_strings() { |
| 156 |
$query = $this->request_data['query_string']; |
| 157 |
|
| 158 |
if ( empty( $query ) ) { |
| 159 |
return false; |
| 160 |
} |
| 161 |
|
| 162 |
// Dangerous patterns |
| 163 |
$patterns = array( |
| 164 |
// Too long query strings |
| 165 |
'/^.{4000,}$/s' => __( 'Query string too long', 'vigilante' ), |
| 166 |
|
| 167 |
// Null bytes |
| 168 |
'/(\x00|%00)/i' => __( 'Null byte detected', 'vigilante' ), |
| 169 |
|
| 170 |
// PHP wrappers |
| 171 |
'/php:\/\//i' => __( 'PHP wrapper detected', 'vigilante' ), |
| 172 |
'/data:\/\//i' => __( 'Data wrapper detected', 'vigilante' ), |
| 173 |
|
| 174 |
// Globals/Request manipulation |
| 175 |
'/(globals|mosconfig)(\[|\%5b)/i' => __( 'Global manipulation attempt', 'vigilante' ), |
| 176 |
'/_request(\[|\%5b)/i' => __( 'Request manipulation attempt', 'vigilante' ), |
| 177 |
|
| 178 |
// Config file access |
| 179 |
'/wp-config\.php/i' => __( 'Config file access attempt', 'vigilante' ), |
| 180 |
|
| 181 |
// Common attack patterns |
| 182 |
'/(\<|%3c).*script.*(\>|%3e)/i' => __( 'Script tag detected', 'vigilante' ), |
| 183 |
'/document\.(cookie|location|write)/i' => __( 'DOM manipulation attempt', 'vigilante' ), |
| 184 |
); |
| 185 |
|
| 186 |
foreach ( $patterns as $pattern => $message ) { |
| 187 |
if ( preg_match( $pattern, $query ) ) { |
| 188 |
return $message; |
| 189 |
} |
| 190 |
} |
| 191 |
|
| 192 |
return false; |
| 193 |
} |
| 194 |
|
| 195 |
/** |
| 196 |
* Check for SQL injection attempts |
| 197 |
* |
| 198 |
* @return string|false Error message or false if safe. |
| 199 |
*/ |
| 200 |
private function check_sql_injection() { |
| 201 |
// Skip SQL injection checks for authenticated admin users on admin pages |
| 202 |
// WordPress handles sanitization for these requests |
| 203 |
if ( is_admin() && is_user_logged_in() && current_user_can( 'edit_posts' ) ) { |
| 204 |
return false; |
| 205 |
} |
| 206 |
|
| 207 |
$to_check = array( |
| 208 |
$this->request_data['query_string'], |
| 209 |
$this->request_data['uri'], |
| 210 |
); |
| 211 |
|
| 212 |
// Check POST data, but exclude content fields that may contain legitimate code/text |
| 213 |
// phpcs:ignore WordPress.Security.NonceVerification.Missing |
| 214 |
if ( ! empty( $_POST ) ) { |
| 215 |
// phpcs:ignore WordPress.Security.NonceVerification.Missing |
| 216 |
$post_data = $_POST; |
| 217 |
|
| 218 |
// Remove fields that commonly contain user content (posts, comments, etc.) |
| 219 |
// These are sanitized by WordPress core |
| 220 |
$excluded_fields = array( |
| 221 |
'content', |
| 222 |
'post_content', |
| 223 |
'comment', |
| 224 |
'description', |
| 225 |
'excerpt', |
| 226 |
'post_excerpt', |
| 227 |
'message', |
| 228 |
'bio', |
| 229 |
'acf', // Advanced Custom Fields |
| 230 |
'meta', // Post meta |
| 231 |
'tax_input', // Taxonomy input |
| 232 |
'_content', // Various content fields |
| 233 |
); |
| 234 |
|
| 235 |
foreach ( $excluded_fields as $field ) { |
| 236 |
unset( $post_data[ $field ] ); |
| 237 |
} |
| 238 |
|
| 239 |
// Only check remaining POST data if not empty |
| 240 |
if ( ! empty( $post_data ) ) { |
| 241 |
$to_check[] = wp_json_encode( $post_data ); |
| 242 |
} |
| 243 |
} |
| 244 |
|
| 245 |
$combined = implode( ' ', array_filter( $to_check ) ); |
| 246 |
|
| 247 |
if ( empty( $combined ) ) { |
| 248 |
return false; |
| 249 |
} |
| 250 |
|
| 251 |
// SQL injection patterns - focused on actual attack vectors |
| 252 |
$patterns = array( |
| 253 |
// Union based injection - high confidence attack pattern |
| 254 |
'/union\s+(all\s+)?select/i' => __( 'UNION SELECT detected', 'vigilante' ), |
| 255 |
|
| 256 |
// SQL commands in URL/query string context (not in POST body) |
| 257 |
// More specific pattern to reduce false positives |
| 258 |
'/[\'\"]\s*(;|--|#)\s*(select|insert|update|delete|drop|truncate|alter|create)/i' => __( 'SQL command injection attempt', 'vigilante' ), |
| 259 |
|
| 260 |
// Hex encoding of SQL - typically used in attacks |
| 261 |
'/0x[0-9a-f]{16,}/i' => __( 'Hex encoding detected', 'vigilante' ), |
| 262 |
|
| 263 |
// Benchmark/sleep attacks - time-based SQL injection |
| 264 |
'/(benchmark|sleep)\s*\(\s*\d/i' => __( 'Time-based injection attempt', 'vigilante' ), |
| 265 |
|
| 266 |
// Information schema access |
| 267 |
'/information_schema\.(tables|columns|schemata)/i' => __( 'Schema access attempt', 'vigilante' ), |
| 268 |
|
| 269 |
// Load file - file read attempt |
| 270 |
'/load_file\s*\(/i' => __( 'Load file attempt', 'vigilante' ), |
| 271 |
|
| 272 |
// Into outfile - file write attempt |
| 273 |
'/into\s+(out|dump)file/i' => __( 'File write attempt', 'vigilante' ), |
| 274 |
|
| 275 |
// Stacked queries with dangerous commands |
| 276 |
'/;\s*(drop|truncate|delete\s+from|update\s+\w+\s+set)/i' => __( 'Stacked query injection', 'vigilante' ), |
| 277 |
); |
| 278 |
|
| 279 |
foreach ( $patterns as $pattern => $message ) { |
| 280 |
if ( preg_match( $pattern, $combined ) ) { |
| 281 |
return $message; |
| 282 |
} |
| 283 |
} |
| 284 |
|
| 285 |
return false; |
| 286 |
} |
| 287 |
|
| 288 |
/** |
| 289 |
* Check for XSS attacks |
| 290 |
* |
| 291 |
* @return string|false Error message or false if safe. |
| 292 |
*/ |
| 293 |
private function check_xss_attacks() { |
| 294 |
$to_check = array( |
| 295 |
$this->request_data['query_string'], |
| 296 |
$this->request_data['uri'], |
| 297 |
); |
| 298 |
|
| 299 |
$combined = implode( ' ', array_filter( $to_check ) ); |
| 300 |
|
| 301 |
if ( empty( $combined ) ) { |
| 302 |
return false; |
| 303 |
} |
| 304 |
|
| 305 |
// URL decode for checking |
| 306 |
$decoded = urldecode( $combined ); |
| 307 |
|
| 308 |
// XSS patterns |
| 309 |
$patterns = array( |
| 310 |
// Script tags |
| 311 |
'/<script[^>]*>/i' => __( 'Script tag detected', 'vigilante' ), |
| 312 |
|
| 313 |
// Event handlers |
| 314 |
'/\bon\w+\s*=/i' => __( 'Event handler detected', 'vigilante' ), |
| 315 |
|
| 316 |
// JavaScript protocol |
| 317 |
'/javascript\s*:/i' => __( 'JavaScript protocol detected', 'vigilante' ), |
| 318 |
|
| 319 |
// VBScript |
| 320 |
'/vbscript\s*:/i' => __( 'VBScript detected', 'vigilante' ), |
| 321 |
|
| 322 |
// Data URL |
| 323 |
'/data\s*:[^,]*base64/i' => __( 'Base64 data URL detected', 'vigilante' ), |
| 324 |
|
| 325 |
// Expression (IE) |
| 326 |
'/expression\s*\(/i' => __( 'CSS expression detected', 'vigilante' ), |
| 327 |
|
| 328 |
// Iframe injection |
| 329 |
'/<iframe[^>]*>/i' => __( 'Iframe injection detected', 'vigilante' ), |
| 330 |
|
| 331 |
// Object/embed |
| 332 |
'/<(object|embed|applet)[^>]*>/i' => __( 'Object tag detected', 'vigilante' ), |
| 333 |
); |
| 334 |
|
| 335 |
foreach ( $patterns as $pattern => $message ) { |
| 336 |
if ( preg_match( $pattern, $decoded ) ) { |
| 337 |
return $message; |
| 338 |
} |
| 339 |
} |
| 340 |
|
| 341 |
return false; |
| 342 |
} |
| 343 |
|
| 344 |
/** |
| 345 |
* Check for file inclusion attacks |
| 346 |
* |
| 347 |
* @return string|false Error message or false if safe. |
| 348 |
*/ |
| 349 |
private function check_file_inclusion() { |
| 350 |
$uri = $this->request_data['uri']; |
| 351 |
$query = $this->request_data['query_string']; |
| 352 |
$combined = $uri . ' ' . $query; |
| 353 |
|
| 354 |
if ( empty( $combined ) ) { |
| 355 |
return false; |
| 356 |
} |
| 357 |
|
| 358 |
// File inclusion patterns |
| 359 |
$patterns = array( |
| 360 |
// Remote file inclusion |
| 361 |
'/=\s*(https?|ftp):\/\//i' => __( 'Remote file inclusion attempt', 'vigilante' ), |
| 362 |
|
| 363 |
// PHP wrappers |
| 364 |
'/(php|zip|glob|phar|ssh2|rar|ogg|expect):\/\//i' => __( 'PHP wrapper detected', 'vigilante' ), |
| 365 |
|
| 366 |
// System files |
| 367 |
'/\/etc\/(passwd|shadow|hosts)/i' => __( 'System file access attempt', 'vigilante' ), |
| 368 |
'/\/proc\/self/i' => __( 'Proc access attempt', 'vigilante' ), |
| 369 |
|
| 370 |
// Windows paths |
| 371 |
'/[a-z]:\\\\(windows|winnt)/i' => __( 'Windows path detected', 'vigilante' ), |
| 372 |
); |
| 373 |
|
| 374 |
foreach ( $patterns as $pattern => $message ) { |
| 375 |
if ( preg_match( $pattern, $combined ) ) { |
| 376 |
return $message; |
| 377 |
} |
| 378 |
} |
| 379 |
|
| 380 |
return false; |
| 381 |
} |
| 382 |
|
| 383 |
/** |
| 384 |
* Check for directory traversal attacks |
| 385 |
* |
| 386 |
* @return string|false Error message or false if safe. |
| 387 |
*/ |
| 388 |
private function check_directory_traversal() { |
| 389 |
$uri = $this->request_data['uri']; |
| 390 |
$query = $this->request_data['query_string']; |
| 391 |
$combined = urldecode( $uri . ' ' . $query ); |
| 392 |
|
| 393 |
if ( empty( $combined ) ) { |
| 394 |
return false; |
| 395 |
} |
| 396 |
|
| 397 |
// Directory traversal patterns |
| 398 |
$patterns = array( |
| 399 |
'/\.\.\//i' => __( 'Directory traversal detected', 'vigilante' ), |
| 400 |
'/\.\.%2f/i' => __( 'Encoded traversal detected', 'vigilante' ), |
| 401 |
'/%2e%2e\//i' => __( 'Double encoded traversal', 'vigilante' ), |
| 402 |
'/\.\.%5c/i' => __( 'Backslash traversal detected', 'vigilante' ), |
| 403 |
); |
| 404 |
|
| 405 |
foreach ( $patterns as $pattern => $message ) { |
| 406 |
if ( preg_match( $pattern, $combined ) ) { |
| 407 |
return $message; |
| 408 |
} |
| 409 |
} |
| 410 |
|
| 411 |
return false; |
| 412 |
} |
| 413 |
|
| 414 |
/** |
| 415 |
* Check for PHP execution in uploads |
| 416 |
* |
| 417 |
* @return string|false Error message or false if safe. |
| 418 |
*/ |
| 419 |
private function check_php_in_uploads() { |
| 420 |
$uri = $this->request_data['uri']; |
| 421 |
|
| 422 |
// Check if accessing PHP in uploads directory |
| 423 |
if ( preg_match( '/\/wp-content\/uploads\/.*\.ph(p[345s]?|tml)/i', $uri ) ) { |
| 424 |
return __( 'PHP execution in uploads blocked', 'vigilante' ); |
| 425 |
} |
| 426 |
|
| 427 |
return false; |
| 428 |
} |
| 429 |
|
| 430 |
/** |
| 431 |
* Check for access to sensitive files |
| 432 |
* |
| 433 |
* @return string|false Error message or false if safe. |
| 434 |
*/ |
| 435 |
private function check_sensitive_files() { |
| 436 |
$uri = strtolower( $this->request_data['uri'] ); |
| 437 |
|
| 438 |
// Sensitive file patterns |
| 439 |
$sensitive_patterns = array( |
| 440 |
'/\.htaccess$/i', |
| 441 |
'/\.htpasswd$/i', |
| 442 |
'/wp-config\.php$/i', |
| 443 |
'/wp-config-sample\.php$/i', |
| 444 |
'/readme\.html$/i', |
| 445 |
'/licen(se|cia)\.txt$/i', |
| 446 |
'/xmlrpc\.php$/i', // If XML-RPC is disabled |
| 447 |
'/\.git/i', |
| 448 |
'/\.svn/i', |
| 449 |
'/\.env$/i', |
| 450 |
'/composer\.(json|lock)$/i', |
| 451 |
'/package(-lock)?\.json$/i', |
| 452 |
'/\.sql$/i', |
| 453 |
'/\.bak$/i', |
| 454 |
'/\.old$/i', |
| 455 |
'/\.log$/i', |
| 456 |
'/\.ini$/i', |
| 457 |
'/debug\.log$/i', |
| 458 |
'/error_log$/i', |
| 459 |
); |
| 460 |
|
| 461 |
foreach ( $sensitive_patterns as $pattern ) { |
| 462 |
if ( preg_match( $pattern, $uri ) ) { |
| 463 |
return __( 'Access to sensitive file blocked', 'vigilante' ); |
| 464 |
} |
| 465 |
} |
| 466 |
|
| 467 |
return false; |
| 468 |
} |
| 469 |
|
| 470 |
/** |
| 471 |
* Check for bad bots |
| 472 |
* |
| 473 |
* @return string|false Error message or false if safe. |
| 474 |
*/ |
| 475 |
private function check_bad_bots() { |
| 476 |
$user_agent = strtolower( $this->request_data['user_agent'] ); |
| 477 |
|
| 478 |
if ( empty( $user_agent ) ) { |
| 479 |
return false; |
| 480 |
} |
| 481 |
|
| 482 |
// Known malicious bots and scanners |
| 483 |
// NOTE: Matching is done via strpos() on the full User-Agent string, |
| 484 |
// so entries must be specific enough to avoid false positives with |
| 485 |
// legitimate services, plugins, or WordPress loopback requests. |
| 486 |
// Generic short words (e.g. 'scan', 'ninja', 'titan') must stay out |
| 487 |
// of BOTH this list and the htaccess one: the htaccess regex matches |
| 488 |
// bare substrings too, and unlike this layer it runs before PHP, so |
| 489 |
// the ua_whitelist cannot rescue a false positive there. |
| 490 |
$bad_bots = array( |
| 491 |
'ahrefsbot', |
| 492 |
'semrushbot', |
| 493 |
'dotbot', |
| 494 |
'mj12bot', |
| 495 |
'blexbot', |
| 496 |
'linkdexbot', |
| 497 |
'aspiegelbot', |
| 498 |
'alexibot', |
| 499 |
'backlink', |
| 500 |
'bandit', |
| 501 |
'batchftp', |
| 502 |
'bigfoot', |
| 503 |
'blackwidow', |
| 504 |
'blowfish', |
| 505 |
'botalot', |
| 506 |
'builtbottough', |
| 507 |
'bullseye', |
| 508 |
'cheesebot', |
| 509 |
'cherrypicker', |
| 510 |
'chinaclaw', |
| 511 |
'copyrightcheck', |
| 512 |
'crescent', |
| 513 |
'curl/', |
| 514 |
'dittospyder', |
| 515 |
'dragonfly', |
| 516 |
'easydl', |
| 517 |
'ebingbong', |
| 518 |
'ecatch', |
| 519 |
'eirgrabber', |
| 520 |
'emailcollector', |
| 521 |
'emailsiphon', |
| 522 |
'emailwolf', |
| 523 |
'erocrawler', |
| 524 |
'exabot', |
| 525 |
'expressweb', |
| 526 |
'eyenetie', |
| 527 |
'flashget', |
| 528 |
'flunky', |
| 529 |
'frontpage', |
| 530 |
'getright', |
| 531 |
'getweb', |
| 532 |
'go-ahead-got-it', |
| 533 |
'gotit', |
| 534 |
'grabnet', |
| 535 |
'grafula', |
| 536 |
'harvest', |
| 537 |
'hloader', |
| 538 |
'hmview', |
| 539 |
'httplib', |
| 540 |
'httrack', |
| 541 |
'humanlinks', |
| 542 |
'ia_archiver', |
| 543 |
'imagestripper', |
| 544 |
'imagesucker', |
| 545 |
'indy library', |
| 546 |
'infonavirobot', |
| 547 |
'infotekies', |
| 548 |
'intelliseek', |
| 549 |
'interget', |
| 550 |
'intraformant', |
| 551 |
'jakarta', |
| 552 |
'jennybot', |
| 553 |
'jetcar', |
| 554 |
'kenjin', |
| 555 |
'larbin', |
| 556 |
'leechftp', |
| 557 |
'lexibot', |
| 558 |
'libweb', |
| 559 |
'likse', |
| 560 |
'linkscan', |
| 561 |
'linkwalker', |
| 562 |
'lnspiderguy', |
| 563 |
'lwp', |
| 564 |
'magnet', |
| 565 |
'mag-net', |
| 566 |
'markwatch', |
| 567 |
'mass downloader', |
| 568 |
'masscan', |
| 569 |
'microsoft.url', |
| 570 |
'midown', |
| 571 |
'miixpc', |
| 572 |
'missigua', |
| 573 |
'moget', |
| 574 |
'nameprotect', |
| 575 |
'navroad', |
| 576 |
'nearsite', |
| 577 |
'net vampire', |
| 578 |
'netants', |
| 579 |
'netcraft', |
| 580 |
'netmechanic', |
| 581 |
'netspider', |
| 582 |
'nextgensearchbot', |
| 583 |
'nibbler', |
| 584 |
'nicerspro', |
| 585 |
'niki-bot', |
| 586 |
'npbot', |
| 587 |
'offline explorer', |
| 588 |
'offline navigator', |
| 589 |
'openfind', |
| 590 |
'outfoxbot', |
| 591 |
'pagegrabber', |
| 592 |
'pavuk', |
| 593 |
'pcbrowser', |
| 594 |
'php/', |
| 595 |
'pockey', |
| 596 |
'prowebwalker', |
| 597 |
'psycheclone', |
| 598 |
'python-urllib', |
| 599 |
'python-requests', |
| 600 |
'python/', |
| 601 |
'queryn', |
| 602 |
'reget', |
| 603 |
'repomonkey', |
| 604 |
'siphon', |
| 605 |
'siteexplorer', |
| 606 |
'sitesnagger', |
| 607 |
'slurp', |
| 608 |
'smartdownload', |
| 609 |
'snapbot', |
| 610 |
'snoopy', |
| 611 |
'sogou', |
| 612 |
'spacebison', |
| 613 |
'spankbot', |
| 614 |
'sqworm', |
| 615 |
'superbot', |
| 616 |
'superhttp', |
| 617 |
'surfbot', |
| 618 |
'suzuran', |
| 619 |
'szukacz', |
| 620 |
'takeout', |
| 621 |
'teleport', |
| 622 |
'telesoft', |
| 623 |
'thenomad', |
| 624 |
'tighttwatbot', |
| 625 |
'true_robot', |
| 626 |
'turingos', |
| 627 |
'turnitinbot', |
| 628 |
'voideye', |
| 629 |
'webalta', |
| 630 |
'webbandit', |
| 631 |
'webcollector', |
| 632 |
'webcopier', |
| 633 |
'webdup', |
| 634 |
'webenhancer', |
| 635 |
'webfetch', |
| 636 |
'webgo', |
| 637 |
'webmasterworldforumbot', |
| 638 |
'webpictures', |
| 639 |
'webreaper', |
| 640 |
'websauger', |
| 641 |
'webspider', |
| 642 |
'webstripper', |
| 643 |
'websucker', |
| 644 |
'webwhacker', |
| 645 |
'webzip', |
| 646 |
'widow', |
| 647 |
'wisenut', |
| 648 |
'wwwoffle', |
| 649 |
'xaldon', |
| 650 |
'xxxyy', |
| 651 |
'zeus', |
| 652 |
'zermelo', |
| 653 |
'zyborg', |
| 654 |
); |
| 655 |
|
| 656 |
foreach ( $bad_bots as $bot ) { |
| 657 |
if ( strpos( $user_agent, $bot ) !== false ) { |
| 658 |
return sprintf( |
| 659 |
/* translators: %s: Bot name */ |
| 660 |
__( 'Bad bot blocked: %s', 'vigilante' ), |
| 661 |
$bot |
| 662 |
); |
| 663 |
} |
| 664 |
} |
| 665 |
|
| 666 |
return false; |
| 667 |
} |
| 668 |
|
| 669 |
/** |
| 670 |
* Check for empty user agent |
| 671 |
* |
| 672 |
* @return string|false Error message or false if safe. |
| 673 |
*/ |
| 674 |
private function check_empty_user_agent() { |
| 675 |
if ( empty( $this->request_data['user_agent'] ) ) { |
| 676 |
return __( 'Empty user agent blocked', 'vigilante' ); |
| 677 |
} |
| 678 |
return false; |
| 679 |
} |
| 680 |
|
| 681 |
/** |
| 682 |
* Check HTTP method |
| 683 |
* |
| 684 |
* Logged-in users with edit capabilities are excluded to ensure |
| 685 |
* Gutenberg, REST API, and page builders work correctly. |
| 686 |
*/ |
| 687 |
private function check_http_method() { |
| 688 |
// Skip for authenticated users who can edit content |
| 689 |
// They need OPTIONS, PUT, PATCH, DELETE for Gutenberg, REST API, and page builders |
| 690 |
if ( is_user_logged_in() && current_user_can( 'edit_posts' ) ) { |
| 691 |
return; |
| 692 |
} |
| 693 |
|
| 694 |
// Skip for WordPress REST API requests |
| 695 |
// The REST API uses PUT, DELETE, PATCH for legitimate operations and has its own |
| 696 |
// authentication and authorization layer — no need to filter methods here |
| 697 |
$rest_prefix = rest_get_url_prefix(); // Typically 'wp-json' |
| 698 |
if ( false !== strpos( $this->request_data['uri'], '/' . $rest_prefix . '/' ) ) { |
| 699 |
return; |
| 700 |
} |
| 701 |
|
| 702 |
$method = strtoupper( $this->request_data['method'] ); |
| 703 |
$allowed_methods = isset( $this->options['allowed_http_methods'] ) |
| 704 |
? $this->options['allowed_http_methods'] |
| 705 |
: array( 'GET', 'POST', 'HEAD', 'OPTIONS', 'PUT', 'PATCH', 'DELETE' ); |
| 706 |
$allowed = array_map( 'strtoupper', $allowed_methods ); |
| 707 |
|
| 708 |
if ( ! in_array( $method, $allowed, true ) ) { |
| 709 |
$this->block_request( |
| 710 |
'http_method', |
| 711 |
sprintf( |
| 712 |
/* translators: %s: HTTP method */ |
| 713 |
__( 'HTTP method %s not allowed', 'vigilante' ), |
| 714 |
$method |
| 715 |
) |
| 716 |
); |
| 717 |
} |
| 718 |
} |
| 719 |
|
| 720 |
/** |
| 721 |
* Check rate limiting |
| 722 |
*/ |
| 723 |
public function check_rate_limit() { |
| 724 |
// Skip rate limiting for whitelisted IPs |
| 725 |
if ( $this->is_ip_whitelisted() ) { |
| 726 |
return; |
| 727 |
} |
| 728 |
|
| 729 |
// Skip rate limiting for logged-in administrators |
| 730 |
if ( is_user_logged_in() && current_user_can( 'manage_options' ) ) { |
| 731 |
return; |
| 732 |
} |
| 733 |
|
| 734 |
// Allow other modules to opt out — Under Attack mode uses this so that |
| 735 |
// visitors who already passed the JS challenge don't burn the |
| 736 |
// aggressive 30 req/min cap loading a normal page's assets. |
| 737 |
if ( apply_filters( 'vigilante_skip_rate_limit', false ) ) { |
| 738 |
return; |
| 739 |
} |
| 740 |
|
| 741 |
$ip = $this->get_client_ip(); |
| 742 |
$rate_limit = $this->options['rate_limiting']; |
| 743 |
|
| 744 |
// Check if already blocked via queryable option (fast path) |
| 745 |
$active_blocks = get_option( 'vigilante_firewall_blocks', array() ); |
| 746 |
if ( isset( $active_blocks[ $ip ] ) ) { |
| 747 |
if ( time() < $active_blocks[ $ip ]['expires'] ) { |
| 748 |
if ( ! headers_sent() ) { |
| 749 |
status_header( 429 ); |
| 750 |
nocache_headers(); |
| 751 |
} |
| 752 |
wp_die( |
| 753 |
esc_html__( 'Rate limit exceeded. Please try again later.', 'vigilante' ), |
| 754 |
esc_html__( 'Too Many Requests', 'vigilante' ), |
| 755 |
array( 'response' => 429 ) |
| 756 |
); |
| 757 |
} |
| 758 |
// Expired — clean up |
| 759 |
unset( $active_blocks[ $ip ] ); |
| 760 |
update_option( 'vigilante_firewall_blocks', $active_blocks, false ); |
| 761 |
} |
| 762 |
|
| 763 |
$max_requests = absint( $rate_limit['requests_per_minute'] ); |
| 764 |
|
| 765 |
// Allow Under Attack mode (or other filters) to override threshold |
| 766 |
$max_requests = absint( apply_filters( 'vigilante_rate_limit_requests', $max_requests ) ); |
| 767 |
|
| 768 |
// Fixed window, anchored to the timestamp of its first request. |
| 769 |
// |
| 770 |
// The count used to live in a transient whose TTL was renewed on every |
| 771 |
// hit, which is a window that never closes: any IP going less than 60 s |
| 772 |
// between requests kept accumulating, so the effective limit was not |
| 773 |
// "requests per minute" but "requests since the last full minute of |
| 774 |
// silence". A logged-in editor publishing several posts in a row could |
| 775 |
// pile up 150+ requests while never exceeding 60 in any single minute, |
| 776 |
// and got a 429. Storing the window start makes the reset explicit |
| 777 |
// instead of relying on the transient expiring. |
| 778 |
$transient_key = 'vigilante_rate_' . md5( $ip ); |
| 779 |
$window = get_transient( $transient_key ); |
| 780 |
$now = time(); |
| 781 |
|
| 782 |
// Counts stored before 2.9.5 were a bare integer with no window start. |
| 783 |
// There is no way to tell how old such a count is, so open a new window. |
| 784 |
if ( ! is_array( $window ) || ! isset( $window['start'], $window['count'] ) ) { |
| 785 |
$window = array( |
| 786 |
'start' => $now, |
| 787 |
'count' => 0, |
| 788 |
); |
| 789 |
} |
| 790 |
|
| 791 |
// Window elapsed: start counting again, even under continuous traffic. |
| 792 |
if ( ( $now - absint( $window['start'] ) ) >= self::RATE_LIMIT_WINDOW ) { |
| 793 |
$window = array( |
| 794 |
'start' => $now, |
| 795 |
'count' => 0, |
| 796 |
); |
| 797 |
} |
| 798 |
|
| 799 |
// Count this request, then allow up to $max_requests per window. |
| 800 |
$window['count'] = absint( $window['count'] ) + 1; |
| 801 |
$request_count = $window['count']; |
| 802 |
|
| 803 |
if ( $request_count > $max_requests ) { |
| 804 |
$base_duration = absint( $rate_limit['block_duration'] ); |
| 805 |
|
| 806 |
// Allow Under Attack mode (or other filters) to override duration |
| 807 |
$base_duration = absint( apply_filters( 'vigilante_rate_limit_duration', $base_duration ) ); |
| 808 |
|
| 809 |
$duration = $base_duration; |
| 810 |
$strikes = 1; |
| 811 |
|
| 812 |
// Progressive blocking: double duration on each repeat offense |
| 813 |
if ( ! empty( $rate_limit['progressive'] ) ) { |
| 814 |
$strikes_key = 'vigilante_strikes_' . md5( $ip ); |
| 815 |
$strikes = absint( get_transient( $strikes_key ) ) + 1; |
| 816 |
|
| 817 |
$max_duration = absint( $rate_limit['max_block_duration'] ?? 86400 ); |
| 818 |
$duration = min( |
| 819 |
$base_duration * pow( 2, $strikes - 1 ), |
| 820 |
$max_duration |
| 821 |
); |
| 822 |
|
| 823 |
// Persist strikes for 24h so they accumulate across blocks |
| 824 |
set_transient( $strikes_key, $strikes, 86400 ); |
| 825 |
} |
| 826 |
|
| 827 |
// Store block in queryable option for admin UI |
| 828 |
$active_blocks[ $ip ] = array( |
| 829 |
'expires' => time() + $duration, |
| 830 |
'blocked_at' => time(), |
| 831 |
'duration' => $duration, |
| 832 |
'reason' => 'rate_limit', |
| 833 |
'strikes' => $strikes, |
| 834 |
); |
| 835 |
update_option( 'vigilante_firewall_blocks', $active_blocks, false ); |
| 836 |
|
| 837 |
$this->block_request( 'rate_limit', __( 'Rate limit exceeded. Please try again later.', 'vigilante' ), 429 ); |
| 838 |
} |
| 839 |
|
| 840 |
// The TTL only garbage-collects the payload once the IP goes quiet; what |
| 841 |
// bounds the count is the window reset above, not the expiry. |
| 842 |
set_transient( $transient_key, $window, self::RATE_LIMIT_WINDOW ); |
| 843 |
} |
| 844 |
|
| 845 |
/** |
| 846 |
* Block a request |
| 847 |
* |
| 848 |
* @param string $reason Reason code for blocking. |
| 849 |
* @param string $message Message to log. |
| 850 |
* @param int $status_code HTTP status code. |
| 851 |
*/ |
| 852 |
private function block_request( $reason, $message, $status_code = 403 ) { |
| 853 |
// Log the block |
| 854 |
if ( $this->activity_log ) { |
| 855 |
$this->activity_log->log( |
| 856 |
'firewall', |
| 857 |
'blocked', |
| 858 |
$message, |
| 859 |
array( |
| 860 |
'reason' => $reason, |
| 861 |
'uri' => $this->request_data['uri'] ?? '', |
| 862 |
'ip' => $this->get_client_ip(), |
| 863 |
'user_agent'=> $this->request_data['user_agent'] ?? '', |
| 864 |
), |
| 865 |
'warning' |
| 866 |
); |
| 867 |
} |
| 868 |
|
| 869 |
// Set response headers |
| 870 |
if ( ! headers_sent() ) { |
| 871 |
status_header( $status_code ); |
| 872 |
nocache_headers(); |
| 873 |
} |
| 874 |
|
| 875 |
// Return appropriate response |
| 876 |
if ( 429 === $status_code ) { |
| 877 |
wp_die( |
| 878 |
esc_html( $message ), |
| 879 |
esc_html__( 'Too Many Requests', 'vigilante' ), |
| 880 |
array( 'response' => 429 ) |
| 881 |
); |
| 882 |
} |
| 883 |
|
| 884 |
wp_die( |
| 885 |
esc_html( $message ), |
| 886 |
esc_html__( 'Forbidden', 'vigilante' ), |
| 887 |
array( 'response' => 403 ) |
| 888 |
); |
| 889 |
} |
| 890 |
|
| 891 |
/** |
| 892 |
* Check if current IP is whitelisted |
| 893 |
* |
| 894 |
* @return bool |
| 895 |
*/ |
| 896 |
private function is_ip_whitelisted() { |
| 897 |
$whitelist = $this->options['ip_whitelist'] ?? array(); |
| 898 |
|
| 899 |
return Vigilante_IP_Utils::in_list( $this->get_client_ip(), $whitelist ); |
| 900 |
} |
| 901 |
|
| 902 |
/** |
| 903 |
* Check if current IP is blacklisted |
| 904 |
* |
| 905 |
* @return bool |
| 906 |
*/ |
| 907 |
private function is_ip_blacklisted() { |
| 908 |
$blacklist = $this->options['ip_blacklist'] ?? array(); |
| 909 |
|
| 910 |
return Vigilante_IP_Utils::in_list( $this->get_client_ip(), $blacklist ); |
| 911 |
} |
| 912 |
|
| 913 |
/** |
| 914 |
* Check if current User-Agent is whitelisted |
| 915 |
* |
| 916 |
* Partial matching: if the request UA contains any whitelisted string, |
| 917 |
* it bypasses all firewall checks. Useful for services like ManageWP, MainWP, etc. |
| 918 |
* |
| 919 |
* @return bool |
| 920 |
*/ |
| 921 |
private function is_ua_whitelisted() { |
| 922 |
$whitelist = $this->options['ua_whitelist'] ?? array(); |
| 923 |
|
| 924 |
if ( empty( $whitelist ) ) { |
| 925 |
return false; |
| 926 |
} |
| 927 |
|
| 928 |
$user_agent = isset( $_SERVER['HTTP_USER_AGENT'] ) ? sanitize_text_field( wp_unslash( $_SERVER['HTTP_USER_AGENT'] ) ) : ''; |
| 929 |
|
| 930 |
if ( empty( $user_agent ) ) { |
| 931 |
return false; |
| 932 |
} |
| 933 |
|
| 934 |
$ua_lower = strtolower( $user_agent ); |
| 935 |
|
| 936 |
foreach ( $whitelist as $allowed ) { |
| 937 |
$allowed = trim( $allowed ); |
| 938 |
if ( ! empty( $allowed ) && false !== strpos( $ua_lower, strtolower( $allowed ) ) ) { |
| 939 |
return true; |
| 940 |
} |
| 941 |
} |
| 942 |
|
| 943 |
return false; |
| 944 |
} |
| 945 |
|
| 946 |
/** |
| 947 |
* Check if current User-Agent is blacklisted |
| 948 |
* |
| 949 |
* Partial matching: if the request UA contains any blacklisted string, block it. |
| 950 |
* |
| 951 |
* @return bool |
| 952 |
*/ |
| 953 |
private function is_ua_blacklisted() { |
| 954 |
$blacklist = $this->options['ua_blacklist'] ?? array(); |
| 955 |
|
| 956 |
if ( empty( $blacklist ) ) { |
| 957 |
return false; |
| 958 |
} |
| 959 |
|
| 960 |
$user_agent = $this->request_data['user_agent'] ?? ''; |
| 961 |
|
| 962 |
if ( empty( $user_agent ) ) { |
| 963 |
return false; |
| 964 |
} |
| 965 |
|
| 966 |
$ua_lower = strtolower( $user_agent ); |
| 967 |
|
| 968 |
foreach ( $blacklist as $blocked ) { |
| 969 |
$blocked = trim( $blocked ); |
| 970 |
if ( ! empty( $blocked ) && false !== strpos( $ua_lower, strtolower( $blocked ) ) ) { |
| 971 |
return true; |
| 972 |
} |
| 973 |
} |
| 974 |
|
| 975 |
return false; |
| 976 |
} |
| 977 |
|
| 978 |
/** |
| 979 |
* Get client IP address |
| 980 |
* |
| 981 |
* Delegates to the shared resolver, which only trusts REMOTE_ADDR unless a |
| 982 |
* proxy header has been explicitly declared in settings. |
| 983 |
* |
| 984 |
* @return string |
| 985 |
*/ |
| 986 |
private function get_client_ip() { |
| 987 |
return Vigilante_IP_Utils::get_client_ip(); |
| 988 |
} |
| 989 |
|
| 990 |
// ========================================================================= |
| 991 |
// BLOCK MANAGEMENT (static, for admin UI) |
| 992 |
// ========================================================================= |
| 993 |
|
| 994 |
/** |
| 995 |
* Get currently active firewall blocks |
| 996 |
* |
| 997 |
* Cleans expired entries on each call. |
| 998 |
* |
| 999 |
* @return array Active blocks keyed by IP address. |
| 1000 |
*/ |
| 1001 |
public static function get_active_blocks() { |
| 1002 |
$blocks = get_option( 'vigilante_firewall_blocks', array() ); |
| 1003 |
$now = time(); |
| 1004 |
$dirty = false; |
| 1005 |
|
| 1006 |
foreach ( $blocks as $ip => $data ) { |
| 1007 |
if ( $now >= $data['expires'] ) { |
| 1008 |
unset( $blocks[ $ip ] ); |
| 1009 |
$dirty = true; |
| 1010 |
} |
| 1011 |
} |
| 1012 |
|
| 1013 |
if ( $dirty ) { |
| 1014 |
update_option( 'vigilante_firewall_blocks', $blocks, false ); |
| 1015 |
} |
| 1016 |
|
| 1017 |
return $blocks; |
| 1018 |
} |
| 1019 |
|
| 1020 |
/** |
| 1021 |
* Manually unblock an IP from rate limit blocks |
| 1022 |
* |
| 1023 |
* @param string $ip IP address to unblock. |
| 1024 |
* @return bool Whether the IP was found and removed. |
| 1025 |
*/ |
| 1026 |
public static function unblock_ip( $ip ) { |
| 1027 |
$blocks = get_option( 'vigilante_firewall_blocks', array() ); |
| 1028 |
|
| 1029 |
if ( ! isset( $blocks[ $ip ] ) ) { |
| 1030 |
return false; |
| 1031 |
} |
| 1032 |
|
| 1033 |
unset( $blocks[ $ip ] ); |
| 1034 |
update_option( 'vigilante_firewall_blocks', $blocks, false ); |
| 1035 |
|
| 1036 |
// Clean related transients |
| 1037 |
$hash = md5( $ip ); |
| 1038 |
delete_transient( 'vigilante_rate_block_' . $hash ); |
| 1039 |
delete_transient( 'vigilante_rate_' . $hash ); |
| 1040 |
delete_transient( 'vigilante_strikes_' . $hash ); |
| 1041 |
|
| 1042 |
return true; |
| 1043 |
} |
| 1044 |
} |
